Data for the region shows that Nigeria accounts for an estimated 90% of regional GDP and exports (mostly crude oil). The outlook for both Nigeria and Ghana, the second key member of the block, is good in 2018: Nigeria is improving oil production, Ghana is getting a boost from an expansionary 2018 government budget and rising energy production; Guinea, Liberia and Sierra Leone are on the up as their recovery from the effects of Ebola gathers pace; and the positive political outlook in The Gambia is driving economic prospects.